FIELD: medicine. SUBSTANCE: essence of this method resides in manufacturing native sterile medicinal preparation of 0.1 to 0.8-percent solution of DNA sodium salt having molecular mass of 280 to 400 ths daltons within fraction range of 30 ths daltons in 0.09 to 0.11-percent aqueous solution of sodium chloride, which remains transparent during 2 years. Disclosed method prescribes using ultrasonic treatment of DNA solutions in continuous flow under conditions allowing to obtain permanent molecular mass in prescribed range. EFFECT: more sophisticated technique. 1 dwg, 2 tbl
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